| Title |
A Disturbance Observer-Based Output Feedback Controller for a DC/DC Boost Converter with Load Variation |
| Authors |
정구종(Jeong, Goo-Jong) ; 김인혁(Kim, In-Hyuk) ; 손영익(Son, Young-Ik) |
| Keywords |
Boost Converter ; Disturbance Observer ; Non-minimum Phase ; Output Feedback Control |
| Abstract |
Output voltage of a DC/DC power converter system is likely to be distorted if variable loads exist in the output terminal. This paper presents a new disturbance observer(DOB) approach to maintain a robust regulation of the output voltage of a boost type DC/DC converter. Unlike the buck-type converter case, the regulation problem of the boost converter is very complicated by the fact that, with respect to the output voltage to be regulated, the system is non-minimum phase. Owing to the non-minimum phase property the classical DOB approach has not been applied to the boost converter. Motivated by a recent result on the application of DOB to non-mimimum phase system, an output feedback control law is proposed by using a parallel feedforward compensator. Simulation results using the Simulink SimPowerSystems prove the performance of the proposed controller against load variation. |